Resizing and centred padding for SPair experiments

[Ioana-Simion]

Hello, thank you very much for sharing this great work!

I'm in the process of testing other Dino based models on this benchmark. I noticed that for the SPair dataset we're doing a resizing of images while also in the evals/models/dino.py we're doing a centred padding.

I was testing the benchmark on different resolutions and noticed a difference in performance when both resizing + padding is being enforced compared to just resizing.

I was wondering what is the purpose of using both (for base SPair experiments I believe we're resizing images to 800 x 800 and then applying centred padding) or in general whether resizing/centred padding was preferred during evaluation. Thank you!